Process of generating foam from foam-developing substances



Patented May a, 1 928.

UNITED STATES PATENT OFFICE.

BUDOIJ' SG HNABEL OI BERLIN, GER-HAIRY, ASSIGHOB '10 LIINIEAX AC'I..-GES., F

' BERLIN, GERMANY.

zgnocnss or GENEBATIRG rem rnou rom-mavnmrme sunsrmcns.

llo Drawing. Application fled. April 23, 1927, Serial 110. 186,164, and in Germany September 30, 1925.

the. combined :oidissolved carbonic acid again as soon as the pressure is removed. In liquids like beer the release of the carbonic acid is accompanied by a copious development of foam.

The utilization of thisphenomenon in my improved processtakes place substantially in the following manner: A'tankvfilled with a liquid capab e of developing foam, for instance a solution of saponin, is put in communication with a steel bottle containing liquid carbonic acid until the saponin solution has absorbed the uantity of carbonic acid corresponding wit the pressure prevailing whereupon the tankis closed by a cock. If ,thisecock, which may be connected with a hose with nozzle, is' opened a vigorous ebullition of the foam generating liquid takes place owing to the sudden relief of the pressure and in consequence thereof astrong develo ment of foam, as extensive experiments av'e roved.

Whetlier t e foam developed is allowed to escape merely b opening the cock or through anjascen ing pipe hne is aquestion of suitability only. It is, furthermore, quite 1 either mecha nically, chemically or catalyticalxlly;

arious' changes andfinodifications may be made in my process without departing from the s" irit of my invention and I deslre, there ore, that the claims should be read as limited by the state of the art only.

Iclaimas my invention I 1. The process of generating foam from foam developing substances, which consists in oversaturating a saponin solution with a .gas capable of being absorbed, in a container under pressure, in such a manner that on relieving the-pressure the absorbed gas is liberated again and develops foam in conjunction with the liquid.

'2, The process of generating foam from foam developing substances, which consists in oversaturating a saponin solution with carbonic acid gas in a container standing under pressure, so that on relieving the pressure the carbonic acid gas is liberated and forms foam in conjunction with the saponin solution. 

